Even if I knew how to make the software send . . .
. . with 48 possible ports that would take a long time, and if there was actually a problem with the software, it would be inconclusive.
No, I need the software vendor to tell me what port they are sending to, and to trgger a send - or we may need to move it to a different port, which only they can do.
I do local hardware support for a couple of LIS (Laboratory Information System) vendors. They have been entirely uninterested in me knowing anything about the software, and I'm happy with that.
The client is just going to have to pony up for a year's support.